Winding for the stationary members of alternating current dynamo-electric machines



June 25, 1935. G. A. JuHLiN 2,006,170

WINDING FOR THE STATIONARY MEMBERS OF ALTERNATING CURRENT DYNAMO ELECTRIC MACHINES Filed April so, 1954 Inventor: GUSCaF XJUIIiTw,

HIS Attcnrrwey Patented .lune 25, 1935 UNITED STATES PATENT OFFICE WINDING FOR THE STATIONARY MEMBERS F ALTEBNATING CURRENT DYNAMO- ELECTRIC MACHINES Gustaf Adolf Juhlin, Timperley, England, assignor to General Electric Company, a corporation of New York Application April 30, 1934, Serial No. 723,245 In Great Britain May 11, 1933 2 Claims. (Cl. 171-206) My invention relates to a winding for the stastationary member.v The slots for one phase of tionary members of alternating-current dynathe winding are indicated at 2 and 3 respectively. mo-electric machines which is constructed from The 'active portion of the winding comprises a conductors having a plurality of concentric conplurality of conductors 4 arranged in slots in 5 ducting elements. Windings of this type are the stationary member. Each of the slot con- 5 connected so that corresponding conducting eleductors has vthree concentric conducting elements are parts of separate circuits which are ments 5, 6 and 'l insulated from each other. The connected in series. The circuits formed by the slot conductors extend-a convenient distance beinnermost or center conducting elements of the yond the end of the stationary member, as shown 10 conductors is preferably at the highest voltage, in Fig- 2- CdlleSpOnding COndllCting elements 10 and the circuit formed by the cuter conducting of the slot conductors` 4 are Connected together elements is at the lowest voltage. by end connectors 8 which likewise have three In windings of this type it has been found concentric conducting elements insulated from impossible to make the winding from a single each other. The end connectors are made by length of conductor owing to the great length cutting the center conductor 9 to the correct 15 of conductor which would have to be handled length and bending the @OndlletOi ini/0 the Teand also tc the practical diriiculty of bending the quired shape or configuration for Connecting conductors in order to form the end connection tWO StatOr SlOt @OnduCiOrS- The @Ondlleil Will without having a very great overhang resulting usually have fOllI bends, aS shOWn in Fg- 2, the

in weakening the winding from a mechanical ends of the conductor being parallel to each other go point of view. For this reason, conductors havand spaced apal"c the saine distance as the 510i? ing concentric conducting elements have not COnductors which it is to connect. After formbeen used for the end connections, and the coring the Center CendllCtOI 9 t0 the ledlliled Shape, responding conducting elements of the slot cona layer l0 0f insulation iS appliedy and the inductors have been connected together by means termediale Condlleting element ll is laid Ovei 25 of separate conductors. With such an arrangethe surface of the layer of insulation. A layer ment the end connector for the center element of insulation I2 is then applied to the outside of of the slot conductor has the full voltage to the intermediate conductor, and the outer conground impressed upon it, and part of the adducting element I3 is then laid in place over the vantage obtained by using concentric conductors insulation and the entire @OndllCtOI is COVeled 30 is lost. According to my invention the end conwith insulation suitable for the required voltage. nectors are formed of concentric conductors hav- The end Connector is thus formed U0 the desired ing the same number of conducting elements as Shape Without requiring any bending 0f the the slot conductors, and the respective conduct- Completed eOndUCtOl Which WOllld mechanically ing elements are concentrically joined together, weaken the conductor. 35 In order to avoid the mechanical diiointy of After the construction of the end connection, bending concentric conductors, the end conas above described, the end connection is joined nectors are made in the configuration or shape to the slot conductors for which it is intended. required. The joints between two of the slot conductors For a better understanding of my invention and their respective end connectors are shown 40 reference may be had to the accompanying drawat Il and I5, and an enlarged Sectional View ing in which Fig. l is a diagrammatic end eleva- 0f One jOlnl' is shOWn in Fig. 3i In making Slleh tion of the stationary member of a two-pole, 3- a. joint, the center conducting element 5 of the phase, alternating-current dynamo-electric maslot conductor is joined to the center conductchine showing the end connectors for a single ing element 9 of the end connector preferably 45 phase of the winding; Fig. 2 is a sectional view by silver solderingy and insulation iS applied of the front end of the stationary member on over the joint. The intermediate conducting line 2-2 of Fig. 1; and Fig. 3 is an enlarged element 6 of the slot conductor is then joined sectional View of a joint between a slot and an to the intermediate connecting element Il of the end conductor. end connector, and a layer of insulation is ap- Referring to the drawing, the field structure plied thereto. Finally, the outer conducting of the stationary member which is diagramelement 1 of the slot conductor is joined to the matically indicated at I is of the non-salient pole outer conducting element I3 of the end contype in which the active portion of the winding nector, and the outer insulation is applied.

is placed in slots which extend axially of the When the connection of the slot conductors by the end connectors is completed, there will be three complete circuits in each phase, one circuit consisting of all the center conducting elements 5, another consisting of al1 the intermediate conducting elements 6, and vthe third circuit consisting of all the outer .conducting elements 1. In order to connect these circuits in series, leads I6 and I'I which also have three concentric conducting elements, I8, I9, and 20,

are concentrically connected to each end of they phase winding and led to ,a terminall box 2i,

Where the three separate circuits are connected in series. The center conducting element of lead I6 is connected by means of a conductor 22 to the high-voltage terminal 23', the center conducting element of lead I'I is connected to the intermediate conducting element of lead I6A by conductor 24, the intermediate conducting element of lead II is connected tothe outer conducting element of lead I6 by conductor 25,

and the'outer conducting element of lead I1 is connected to the low-voltage terminal Z6 `by conductor 21. 'I'he voltage across the terminals 23 and 26 is the sum of the voltages acrossY each of the separate circuits made up' of correspond'- ing concentric conducting elements. The `terminals of all the phases may be contained in the same terminal box, as shownat A, B, and `C in Fig. 1, and the interconnection `of 'fthenwindings may be made therein as desired.

Although I have shown a particular, embodiment of my invention', I do not desire-to be limited tothe construction described, `and I intend in the appended claims to cover all modiand` scope of my invention.

What I claim as new and desire to secure by Letters Patent of the United States, is:

1. A stationary member for a dynamo-electric machine, aV Winding for said stationary member comprising a plurality of conductors arranged in slots in said stationary member, each of said slot conductors comprising a plurality of con- 4centric conducting elements insulated from each other, end connections each comprising a plurality of concentric conducting elements respectively connected to the concentric elements of said slot conductorslfor connecting the corresponding concentric elements of said slot conductors into separate circuits, and means for connecting said circuits in series.

2; A stationary member for a dynamo-electric machine, a Winding for said stationary member comprising a plurality of conductors arranged in slots in said stationary member, each of said slot conductors comprising a plurality of concentric conducting elements insulated from each other, means including end connections each comprising a plurality of concentric conducting elements respectively connected to the concen tric elements of said slot conductors for connecting the corresponding concentric elements of said slot conductors into separate circuits, a terminal box, means including leads each comprising a plurality of concentric conducting elements respectively connected to the concentric elements of ysaid circuits for leading said circuits to said terminal box, and means arranged Within said terminal box for connecting said circuits in series.

- GUSTAF ADOLF JUHLIN. 

